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1 //-----------------------------------------------------------------------------
2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
3 //
4 // cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
5 //
6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
7 // at your option, any later version. See the LICENSE.txt file for the text of
8 // the license.
9 //-----------------------------------------------------------------------------
10 // Low frequency AWID26/50 commands
11 //-----------------------------------------------------------------------------
12 #include "cmdlfawid.h" // AWID function declarations
13
14 static int CmdHelp(const char *Cmd);
15
16 int usage_lf_awid_fskdemod(void) {
17 PrintAndLog("Enables AWID compatible reader mode printing details of scanned AWID26 or AWID50 tags.");
18 PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
19 PrintAndLog("If the [1] option is provided, reader mode is exited after reading a single AWID card.");
20 PrintAndLog("");
21 PrintAndLog("Usage: lf awid fskdemod [h] [1]");
22 PrintAndLog("Options:");
23 PrintAndLog(" h : This help");
24 PrintAndLog(" 1 : (optional) stop after reading a single card");
25 PrintAndLog("");
26 PrintAndLog("Samples:");
27 PrintAndLog(" lf awid fskdemod");
28 PrintAndLog(" lf awid fskdemod 1");
29 return 0;
30 }
31
32 int usage_lf_awid_sim(void) {
33 PrintAndLog("Enables simulation of AWID card with specified facility-code and card number.");
34 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
35 PrintAndLog("");
36 PrintAndLog("Usage: lf awid sim [h] <format> <facility-code> <card-number>");
37 PrintAndLog("Options:");
38 PrintAndLog(" h : This help");
39 PrintAndLog(" <format> : format length 26|50");
40 PrintAndLog(" <facility-code> : 8|16bit value facility code");
41 PrintAndLog(" <card number> : 16|32-bit value card number");
42 PrintAndLog("");
43 PrintAndLog("Samples:");
44 PrintAndLog(" lf awid sim 26 224 1337");
45 PrintAndLog(" lf awid sim 50 2001 13371337");
46 return 0;
47 }
48
49 int usage_lf_awid_clone(void) {
50 PrintAndLog("Enables cloning of AWID card with specified facility-code and card number onto T55x7.");
51 PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");
52 PrintAndLog("");
53 PrintAndLog("Usage: lf awid clone [h] <format> <facility-code> <card-number> [Q5]");
54 PrintAndLog("Options:");
55 PrintAndLog(" h : This help");
56 PrintAndLog(" <format> : format length 26|50");
57 PrintAndLog(" <facility-code> : 8|16bit value facility code");
58 PrintAndLog(" <card number> : 16|32-bit value card number");
59 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
60 PrintAndLog("");
61 PrintAndLog("Samples:");
62 PrintAndLog(" lf awid clone 26 224 1337");
63 PrintAndLog(" lf awid clone 50 2001 13371337");
64 return 0;
65 }
66
67 int usage_lf_awid_brute(void){
68 PrintAndLog("Enables bruteforce of AWID reader with specified facility-code.");
69 PrintAndLog("This is a attack against reader. if cardnumber is given, it starts with it and goes up / down one step");
70 PrintAndLog("if cardnumber is not given, it starts with 1 and goes up to 65535");
71 PrintAndLog("");
72 PrintAndLog("Usage: lf awid brute [h] a <format> f <facility-code> c <cardnumber> d <delay>");
73 PrintAndLog("Options:");
74 PrintAndLog(" h : This help");
75 PrintAndLog(" a <format> : format length 26|50");
76 PrintAndLog(" f <facility-code> : 8|16bit value facility code");
77 PrintAndLog(" c <cardnumber> : (optional) cardnumber to start with, max 65535");
78 PrintAndLog(" d <delay> : delay betweens attempts in ms. Default 1000ms");
79 PrintAndLog("");
80 PrintAndLog("Samples:");
81 PrintAndLog(" lf awid brute a 26 f 224");
82 PrintAndLog(" lf awid brute a 50 f 2001 d 2000");
83 PrintAndLog(" lf awid brute a 50 f 2001 c 200 d 2000");
84 return 0;
85 }
86
87 static bool sendTry(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint32_t delay, uint8_t *bs, size_t bs_len){
88
89 PrintAndLog("Trying FC: %u; CN: %u", fc, cn);
90 if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
91 PrintAndLog("Error with tag bitstream generation.");
92 return FALSE;
93 }
94
95 uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
96 uint64_t arg2 = 50; // clk RF/50 invert=0
97 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, bs_len}};
98 memcpy(c.d.asBytes, bs, bs_len);
99 clearCommandBuffer();
100 SendCommand(&c);
101 msleep(delay);
102 return TRUE;
103 }
104 static int sendPing(){
105 UsbCommand resp;
106 UsbCommand ping = {CMD_PING};
107 clearCommandBuffer(); SendCommand(&ping);
108 clearCommandBuffer(); SendCommand(&ping);
109 clearCommandBuffer(); SendCommand(&ping);
110 if (WaitForResponseTimeout(CMD_ACK, &resp, 1000)) {
111 PrintAndLog("aborted via keyboard!");
112 return 0;
113 }
114 PrintAndLog("Device didnt respond to ABORT");
115 return 1;
116 }
117
118 int CmdAWIDDemodFSK(const char *Cmd) {
119 int findone = 0;
120 if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();
121 if (Cmd[0] == '1') findone = 1;
122
123 UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
124 clearCommandBuffer();
125 SendCommand(&c);
126 return 0;
127 }
128
129 //refactored by marshmellow
130 int getAWIDBits(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint8_t *bits) {
131
132 // the return bits, preamble 0000 0001
133 bits[7] = 1;
134
135 uint8_t pre[66];
136 memset(pre, 0, sizeof(pre));
137
138 // add formatlength
139 num_to_bytebits(fmtlen, 8, pre);
140
141 // add facilitycode, cardnumber and wiegand parity bits
142 if ( fmtlen == 26 ) {
143 uint8_t wiegand[24];
144 num_to_bytebits(fc, 8, wiegand);
145 num_to_bytebits(cn, 16, wiegand+8);
146 wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
147 } else {
148 uint8_t wiegand[48];
149 num_to_bytebits(fc, 16, wiegand);
150 num_to_bytebits(cn, 32, wiegand+16);
151 wiegand_add_parity(pre+8, wiegand, sizeof(wiegand));
152 }
153
154 // add AWID 4bit parity
155 size_t bitLen = addParity(pre, bits+8, 66, 4, 1);
156
157 if (bitLen != 88) return 0;
158 return 1;
159 }
160
161 int CmdAWIDSim(const char *Cmd) {
162 uint32_t fc = 0, cn = 0;
163 uint8_t fmtlen = 0;
164 uint8_t bits[96];
165 uint8_t *bs = bits;
166 size_t size = sizeof(bits);
167 memset(bs, 0x00, size);
168
169 uint64_t arg1 = ( 10 << 8 ) + 8; // fcHigh = 10, fcLow = 8
170 uint64_t arg2 = 50; // clk RF/50 invert=0
171
172 char cmdp = param_getchar(Cmd, 0);
173 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_sim();
174
175 fmtlen = param_get8(Cmd, 0);
176 fc = param_get32ex(Cmd, 1, 0, 10);
177 cn = param_get32ex(Cmd, 2, 0, 10);
178 if ( !fc || !cn) return usage_lf_awid_sim();
179
180 switch(fmtlen) {
181 case 26:
182 if ((fc & 0xFF) != fc) {
183 fc &= 0xFF;
184 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
185 }
186
187 if ((cn & 0xFFFF) != cn) {
188 cn &= 0xFFFF;
189 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
190 }
191 break;
192 case 50:
193 if ((fc & 0xFFFF) != fc) {
194 fc &= 0xFFFF;
195 PrintAndLog("Facility-Code Truncated to 16-bits (AWID50): %u", fc);
196 }
197 break;
198 default: break;
199 }
200
201 PrintAndLog("Emulating AWID %u -- FC: %u; CN: %u\n", fmtlen, fc, cn);
202 PrintAndLog("Press pm3-button to abort simulation or run another command");
203
204 if (!getAWIDBits(fmtlen, fc, cn, bs)) {
205 PrintAndLog("Error with tag bitstream generation.");
206 return 1;
207 }
208 // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
209 // arg1 --- fcHigh<<8 + fcLow
210 // arg2 --- Inversion and clk setting
211 // 96 --- Bitstream length: 96-bits == 12 bytes
212 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
213 memcpy(c.d.asBytes, bs, size);
214 clearCommandBuffer();
215 SendCommand(&c);
216 return 0;
217 }
218
219 int CmdAWIDClone(const char *Cmd) {
220 uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
221 uint32_t fc = 0, cn = 0;
222 uint8_t fmtlen = 0;
223 uint8_t bits[96];
224 uint8_t *bs=bits;
225 memset(bs,0,sizeof(bits));
226
227 char cmdp = param_getchar(Cmd, 0);
228 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_awid_clone();
229
230 fmtlen = param_get8(Cmd, 0);
231 fc = param_get32ex(Cmd, 1, 0, 10);
232 cn = param_get32ex(Cmd, 2, 0, 10);
233
234 if ( !fc || !cn) return usage_lf_awid_clone();
235
236 switch(fmtlen) {
237 case 50:
238 if ((fc & 0xFFFF) != fc) {
239 fc &= 0xFFFF;
240 PrintAndLog("Facility-Code Truncated to 16-bits (AWID50): %u", fc);
241 }
242 break;
243 default:
244 fmtlen = 26;
245 if ((fc & 0xFF) != fc) {
246 fc &= 0xFF;
247 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
248 }
249
250 if ((cn & 0xFFFF) != cn) {
251 cn &= 0xFFFF;
252 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
253 }
254 break;
255 }
256
257 if (param_getchar(Cmd, 4) == 'Q' || param_getchar(Cmd, 4) == 'q')
258 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
259 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
260
261 if ( !getAWIDBits(fmtlen, fc, cn, bs)) {
262 PrintAndLog("Error with tag bitstream generation.");
263 return 1;
264 }
265
266 blocks[1] = bytebits_to_byte(bs,32);
267 blocks[2] = bytebits_to_byte(bs+32,32);
268 blocks[3] = bytebits_to_byte(bs+64,32);
269
270 PrintAndLog("Preparing to clone AWID %u to T55x7 with FC: %u, CN: %u", fmtlen, fc, cn);
271 PrintAndLog("Blk | Data ");
272 PrintAndLog("----+------------");
273 PrintAndLog(" 00 | 0x%08x", blocks[0]);
274 PrintAndLog(" 01 | 0x%08x", blocks[1]);
275 PrintAndLog(" 02 | 0x%08x", blocks[2]);
276 PrintAndLog(" 03 | 0x%08x", blocks[3]);
277
278 UsbCommand resp;
279 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
280
281 for (uint8_t i=0; i<4; i++) {
282 c.arg[0] = blocks[i];
283 c.arg[1] = i;
284 clearCommandBuffer();
285 SendCommand(&c);
286 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)){
287 PrintAndLog("Error occurred, device did not respond during write operation.");
288 return -1;
289 }
290 }
291 return 0;
292 }
293
294 int CmdAWIDBrute(const char *Cmd){
295
296 bool errors = false;
297 uint32_t fc = 0, cn = 0, delay = 1000;
298 uint8_t fmtlen = 0;
299 uint8_t bits[96];
300 uint8_t *bs = bits;
301 size_t size = sizeof(bits);
302 memset(bs, 0x00, size);
303 uint8_t cmdp = 0;
304
305 while(param_getchar(Cmd, cmdp) != 0x00 && !errors) {
306 switch(param_getchar(Cmd, cmdp)) {
307 case 'h':
308 case 'H':
309 return usage_lf_awid_brute();
310 case 'f':
311 case 'F':
312 fc = param_get32ex(Cmd ,cmdp+1, 0, 10);
313 if ( !fc )
314 errors = true;
315 cmdp += 2;
316 break;
317 case 'd':
318 case 'D':
319 // delay between attemps, defaults to 1000ms.
320 delay = param_get32ex(Cmd, cmdp+1, 1000, 10);
321 cmdp += 2;
322 break;
323 case 'c':
324 case 'C':
325 cn = param_get32ex(Cmd, cmdp+1, 0, 10);
326 // truncate cardnumber.
327 cn &= 0xFFFF;
328 cmdp += 2;
329 break;
330 case 'a':
331 case 'A':
332 fmtlen = param_get8(Cmd, cmdp+1);
333 cmdp += 2;
334 break;
335 default:
336 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
337 errors = true;
338 break;
339 }
340 }
341 if ( fc == 0 )errors = true;
342 if ( errors ) return usage_lf_awid_brute();
343
344 // limit fc according to selected format
345 switch(fmtlen) {
346 case 50:
347 if ((fc & 0xFFFF) != fc) {
348 fc &= 0xFFFF;
349 PrintAndLog("Facility-code truncated to 16-bits (AWID50): %u", fc);
350 }
351 break;
352 default:
353 if ((fc & 0xFF) != fc) {
354 fc &= 0xFF;
355 PrintAndLog("Facility-code truncated to 8-bits (AWID26): %u", fc);
356 }
357 break;
358 }
359
360 // start
361
362 PrintAndLog("Bruteforceing AWID %d Reader", fmtlen);
363 PrintAndLog("Press pm3-button to abort simulation or press key");
364
365 uint16_t up = cn;
366 uint16_t down = cn;
367
368 for (;;){
369
370 if (ukbhit()) return sendPing();
371
372 // Do one up
373 if ( up < 0xFFFF )
374 if ( !sendTry(fmtlen, fc, up++, delay, bs, size)) return 1;
375
376 // Do one down (if cardnumber is given)
377 if ( cn > 1 )
378 if ( down > 1 )
379 if ( !sendTry(fmtlen, fc, --down, delay, bs, size)) return 1;
380 }
381 return 0;
382 }
383
384 static command_t CommandTable[] = {
385 {"help", CmdHelp, 1, "This help"},
386 {"fskdemod", CmdAWIDDemodFSK, 0, "Realtime AWID FSK demodulator"},
387 {"sim", CmdAWIDSim, 0, "AWID tag simulator"},
388 {"clone", CmdAWIDClone, 0, "Clone AWID to T55x7"},
389 {"brute", CmdAWIDBrute, 0, "Bruteforce card number against reader"},
390 {NULL, NULL, 0, NULL}
391 };
392
393 int CmdLFAWID(const char *Cmd) {
394 clearCommandBuffer();
395 CmdsParse(CommandTable, Cmd);
396 return 0;
397 }
398
399 int CmdHelp(const char *Cmd) {
400 CmdsHelp(CommandTable);
401 return 0;
402 }
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